Vertical windmill with omnidirectional diffusion

Details Vertical windmill with omnidirectional diffusion Vertical windmill with omnidirectional diffusion

1991-09-16

1994-07-26

Williams, Howard L.

Prime-mover dynamo plants

Electric control

Fluid-current motors

290 55, 416119, F03D 706

Patent

active

053329252

ABSTRACT:
A vertical windmill employing aerodynamic lift includes stators that form an omnidirectional diffuser and can rotate out of the wind to reduce the destructive tendencies in high winds. A braking mechanism included in the windmill uses rotation of the airfoils to reduce the lift caused by the wind and disengagement of the airfoils to reduce nearly all lift on the airfoils. Centrifugal force is used to activate the brake in high winds, both to slow the rotor speed and, in extreme winds, to stop the rotor. A motor is provided to drive the windmill to simplify controls and increase energy production.

REFERENCES:
patent: 5057696 (1991-10-01), Thomas
Loth, J. L., "Darriens Rotor With Forward Tilting Blade Speed Control", Solar Engineering, Book No. H00253 (1983) pp. 590-595.

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